@article { dkpl152,
author = { Daniel J. Katz and Philippe Langevin },
title  = { New Open Problems Related to Old Conjectures by Helleseth },
journal = { Cryptography and Communications - Discrete Structures, Boolean Functions and Sequences. },
number = { 2 },
pages = { 175--189 },
volume  = { 8 },
year = {2016},
rang = {A},
url  =  {http://arxiv.org/abs/1412.8530},
}